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re: High Risk threat of Severe Weather for Ala, Miss and Tenn today
Posted on 4/27/11 at 10:19 am to Hawgeye
Posted on 4/27/11 at 10:19 am to Hawgeye
There was Tornado Warnings issued for Jefferson, St. Clair counties.. It was a massive line of storms and James Spann (ABC3340) specifically said that all areas should take cover. It was an unusual outbreak and caught many people off guard
2
Posted on 4/27/11 at 10:21 am to pankReb
I gotta get off here in a bit. About to get hammered by 74 mph winds and lots of hail and rain.
This post was edited on 4/27/11 at 10:22 am
Posted on 4/27/11 at 10:21 am to MsGarrison
I'm just northeast of Collierville, TN and we lost power last night around 7:00. Still don't have it. It's getting pretty old.
There were 3 separate tornado warnings in Shelby County TN last night.
There were 3 separate tornado warnings in Shelby County TN last night.
Posted on 4/27/11 at 10:21 am to memphisplaya
please tell me the guy on tv right now is Marcus Hunter.
Posted on 4/27/11 at 10:22 am to memphisplaya
Posted on 4/27/11 at 10:22 am to reb13
UT just sent out an alert message to take shelter. Too bad my class isn't cancelled.
Posted on 4/27/11 at 10:23 am to Hawgeye
quote:
Where is Jasper, AL?
About 45 minutes NW of Birmingham on US 78 or 'Corridor X' ,future I-22.
Hometown of George "Goober" Lindsey.
Posted on 4/27/11 at 10:23 am to bbvdd
quote:
I'm just northeast of Collierville, TN
I live in Collierville
Small world. Never lost power all week though.
Hope you get it back soon.
quote:
There were 3 separate tornado warnings in Shelby County TN last night.
Hell, there were 3 on the ground the past three days.
Posted on 4/27/11 at 10:24 am to pankReb
IDK there is some ho talking
Posted on 4/27/11 at 10:26 am to I-59 Tiger
"2 fatal and 14 injuries in Webster"
Where is Webster?
Where is Webster?
Posted on 4/27/11 at 10:26 am to memphisplaya
really hope i sent it to the right black guy. would be a bit embarrassing otherwise.
Posted on 4/27/11 at 10:27 am to pankReb
Posted on 4/27/11 at 10:28 am to Hawgeye
Guy just pulls up to get in with them....
"I hope you got good insurance, because your truck is not going to be there when we get done today"
"I hope you got good insurance, because your truck is not going to be there when we get done today"
Posted on 4/27/11 at 10:29 am to memphisplaya
On the AlabamaWx blog with ABC3340, the weather is predicted to be bad:
Sunshine will warm temperatures quickly this morning through the 70s, and it will reach the lower 80s by afternoon. However, the morning balloon data from NWS Birmingham showed very cold air aloft. And, even though dewpoints dropped to the upper 50s as the thunderstorms mixed up the atmosphere, they are already rising, and will rise throughout the day. As the sun continues to heat the atmosphere up, the 70 mph winds at 3,000 feet will start to get mixed with the surface layer winds, so gradient winds will get very gusty by late morning, probably 30 mph at times. And those winds will be out of the south, bringing in Gulf moisture (dewpoints in SW Alabama are in the 70s). Once we get warm, humid air back in place at the surface by noon or so, with cold air aloft, the air will be very unstable. CAPE values (atmospheric potential energy) will reach 3,000 to 5,000 J/kg, supporting strong updrafts and intense storms this afternoon.
The other problem is the wind shear. The main upper-level system will approach by late afternoon. Winds will increase in speed and change direction with height, creating spin about a horizontal axis. Storm updrafts will tilt this rotation into the vertical (like a spiraling football getting tipped at the line of scrimmage), producing rotating storms. The helicity, or a measure of this wind shear, will also be very high, between 300 and 600 m2/s2. It is rare to see this much wind shear in an almost summerlike environment with warm, humid air like this.
The combination of extreme instability (like we see on summer afternoons) and extreme wind shear (like we see often in winter) will create a very dangerous setup over Alabama this afternoon. The energy-helicity index (a combo of CAPE and wind shear) measures the overall tornado potential well. Anything over 2 means tornadoes are possible, and over 5 tornadoes are likely. On April 8, 1998, the EHI was around 6. Today, as you can see on the maps below for 3, 5, and 7 pm, we expect EHI values of 8-10 over much of north and central Alabama, some of the highest I’ve ever seen.
The red areas are EHI’s of 10 or higher…a rare number.
Clearly, with this kind of shear and instability building, very intense storms will form, and almost all of them will rotate. In this environment, numerous tornadoes will likely occur, and some of them may be violent tornadoes. Please take this weather event as seriously as you ever take an event. If a tornado warning is issued, don’t mess around, execute your tornado plan.
Sunshine will warm temperatures quickly this morning through the 70s, and it will reach the lower 80s by afternoon. However, the morning balloon data from NWS Birmingham showed very cold air aloft. And, even though dewpoints dropped to the upper 50s as the thunderstorms mixed up the atmosphere, they are already rising, and will rise throughout the day. As the sun continues to heat the atmosphere up, the 70 mph winds at 3,000 feet will start to get mixed with the surface layer winds, so gradient winds will get very gusty by late morning, probably 30 mph at times. And those winds will be out of the south, bringing in Gulf moisture (dewpoints in SW Alabama are in the 70s). Once we get warm, humid air back in place at the surface by noon or so, with cold air aloft, the air will be very unstable. CAPE values (atmospheric potential energy) will reach 3,000 to 5,000 J/kg, supporting strong updrafts and intense storms this afternoon.
The other problem is the wind shear. The main upper-level system will approach by late afternoon. Winds will increase in speed and change direction with height, creating spin about a horizontal axis. Storm updrafts will tilt this rotation into the vertical (like a spiraling football getting tipped at the line of scrimmage), producing rotating storms. The helicity, or a measure of this wind shear, will also be very high, between 300 and 600 m2/s2. It is rare to see this much wind shear in an almost summerlike environment with warm, humid air like this.
The combination of extreme instability (like we see on summer afternoons) and extreme wind shear (like we see often in winter) will create a very dangerous setup over Alabama this afternoon. The energy-helicity index (a combo of CAPE and wind shear) measures the overall tornado potential well. Anything over 2 means tornadoes are possible, and over 5 tornadoes are likely. On April 8, 1998, the EHI was around 6. Today, as you can see on the maps below for 3, 5, and 7 pm, we expect EHI values of 8-10 over much of north and central Alabama, some of the highest I’ve ever seen.
The red areas are EHI’s of 10 or higher…a rare number.
Clearly, with this kind of shear and instability building, very intense storms will form, and almost all of them will rotate. In this environment, numerous tornadoes will likely occur, and some of them may be violent tornadoes. Please take this weather event as seriously as you ever take an event. If a tornado warning is issued, don’t mess around, execute your tornado plan.
Posted on 4/27/11 at 10:29 am to Hawgeye
there is a Webster, LA north east of shreveport.
Posted on 4/27/11 at 10:30 am to biggsc
quote:
the weather is predicted to be bad:
Well no shite.. I think anyone in Oxford, Memphis or Arkansas could tell people that
Posted on 4/27/11 at 10:30 am to Hawgeye
Probably Webster county MS. Eupora. About 15-20 miles west of Starkville. Heard they got hit pretty hard.
Posted on 4/27/11 at 10:31 am to RollTide1987
quote:
And about the "tornado" in Northport, this person is saying that it touched down near the Old Fayette Road or wherever and that it cut a path about 75-100 yards in width.
I'll ask my boss about that because he lives across the highway (Highway 43) from Old Fayette Road in Cherokee Shores on the lake.
Posted on 4/27/11 at 10:33 am to pankReb
Stay safe everyone. We have been without power since 415 this morning. Another line of storms coming through here now. Ugh.
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